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− | An '''oscilloscope''' (often abbreviated '''o'scope''' or '''scope''') displays signal voltages as a 2-D graph, usually as voltage (vertical axis) as a function of time (horizontal axis | + | An '''oscilloscope''' (often abbreviated '''o'scope''' or '''scope''') displays signal voltages as a 2-D graph, usually as voltage (vertical axis) as a function of time (horizontal axis). |
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The ''probe'' of a o'scope is held against, or is clipped to, the metal wire carrying the signal of interest. | The ''probe'' of a o'scope is held against, or is clipped to, the metal wire carrying the signal of interest. | ||
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A '''dual-trace''' o'scope has 2 probes, so 2 different signals can be seen -- so not only the shape of the signal can be seen, but also the exact time from events on one signal to events on the other signal. | A '''dual-trace''' o'scope has 2 probes, so 2 different signals can be seen -- so not only the shape of the signal can be seen, but also the exact time from events on one signal to events on the other signal. | ||
− | = | + | == techniques == |
Sometimes one wants to look at a 8-bit data bus -- typically one uses a "logic analyzer" to look at lots of time-aligned digital signals. | Sometimes one wants to look at a 8-bit data bus -- typically one uses a "logic analyzer" to look at lots of time-aligned digital signals. | ||
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''... more techniques ...'' | ''... more techniques ...'' | ||
− | = | + | == open source oscilloscopes == |
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− | = | + | === open source oscilloscope: BitScope === |
− | + | * $550 BS100U: 2 analog inputs + 8 digital inputs, optically isolated, from BitScope Designs (MetaChip Pty. Ltd.) [http://bitscope.com/]. ("Scopal" third-party software is available[http://scopal.com/]). (open hardware). | |
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− | = | + | === open source oscilloscope: the MultiAnalyser === |
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Some people on the PIClist have been discussing designing an open-source oscilloscope. | Some people on the PIClist have been discussing designing an open-source oscilloscope. | ||
+ | Of course, you have to already have a working o'scope in order to build and test another o'scope, making this the same sort of chicken-and-egg problem as the [[Projects#RepRap | RepRap]] project, the [http://en.wikipedia.org/wiki/GNU_Compiler_Collection GCC project], and other projects David Cary finds interesting. | ||
− | * I think initial discussions occured on the [http://www.piclist.com/techref/postbot.asp?by=thread&id=%5BEE%5D+scope+project+anyone%3F&tgt=browse "scope project anyone?"] thread [http://www.piclist.com/techref/postbot.asp?by=time&id=piclist\2004\09\17\111014a.txt] at PIClist. | + | * I think initial discussions occured on the [http://www.piclist.com/techref/postbot.asp?by=thread&id=%5BEE%5D+scope+project+anyone%3F&tgt=browse "[EE] scope project anyone?"] thread [http://www.piclist.com/techref/postbot.asp?by=time&id=piclist\2004\09\17\111014a.txt] at PIClist. |
* Later discussion moved to the [http://tech.groups.yahoo.com/group/MultiAnalyser/ "MultiAnalyser" group at Yahoo] | * Later discussion moved to the [http://tech.groups.yahoo.com/group/MultiAnalyser/ "MultiAnalyser" group at Yahoo] | ||
− | + | == some low-cost oscilloscopes == | |
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some low-cost oscilloscopes, in no particular order. | some low-cost oscilloscopes, in no particular order. | ||
− | ''... it would be nice to mention | + | ''... it would be nice to mention # of analog input channels, # of digital input channels, whether it can be used under Linux, does it have output channels ... price should (?) include 2 analog probes, ... is it open hardware? ... anything else?'' |
− | price name comments | + | * price name comments |
− | + | * $150 Poscope basic 2 from PoLabs [http://poscope.com/ PoLabs], 2 analog channels, 16/8 digital channels, PC USB oscilloscope, spectrum analyzer, chart recorder, pattern generator, logic analyzer, PWM/ square generator | |
− | + | * $420 PicoScope 2202 from [http://picotech.com/ Pico Technology]([http://www.picotech.com/picoscope-2202.html ])([http://www.interwld.com/pico/pico-3000.htm ])([http://www.pc-oscilloscopes.com/3000.htm]) | |
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− | * $150 | ||
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− | * $ | ||
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* $200 Hantek DSO-2090 USB PC Oscilloscope [http://www.beigly.com/catalog/hantek-dso2090-oscilloscope-p-96.html] | * $200 Hantek DSO-2090 USB PC Oscilloscope [http://www.beigly.com/catalog/hantek-dso2090-oscilloscope-p-96.html] | ||
* $380.00 DSO2250 100MHz PC-SCOPE 250MS/s [http://world-educational-services.net/cart/index.php?main_page=product_info&cPath=56&products_id=134&zenid=68c155f8ccc626c8d316e8417b32dc5d] | * $380.00 DSO2250 100MHz PC-SCOPE 250MS/s [http://world-educational-services.net/cart/index.php?main_page=product_info&cPath=56&products_id=134&zenid=68c155f8ccc626c8d316e8417b32dc5d] | ||
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* CAN 219.99 Syscomp Electronic Design DSO-101 [http://syscompdesign.com/] (Syscomp supports the "[https://sourceforge.net/projects/oip The Open Instrumentation Project]" [http://syscompdesign.com/oip.htm]) | * CAN 219.99 Syscomp Electronic Design DSO-101 [http://syscompdesign.com/] (Syscomp supports the "[https://sourceforge.net/projects/oip The Open Instrumentation Project]" [http://syscompdesign.com/oip.htm]) | ||
* EUR 427 ETC s.r.o. M520 Oscilloscope [http://etcsk.com/] | * EUR 427 ETC s.r.o. M520 Oscilloscope [http://etcsk.com/] | ||
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* $200 PS40M10 : Swordfish Hand-Held Instrument (1 channel) USB (EasySync) | * $200 PS40M10 : Swordfish Hand-Held Instrument (1 channel) USB (EasySync) | ||
* $220 DS1M12 : Stingray Multi-Function Instrument (2 channel) USB (EasySync) | * $220 DS1M12 : Stingray Multi-Function Instrument (2 channel) USB (EasySync) | ||
− | * under $600 : [[Jameco]] has some actual stand-alone oscilloscopes for under $600 | + | * under $600 : [[Jameco]] has some actual stand-alone oscilloscopes for under $600. |
* under $200 : Carl's Electronics has some stand-alone and PC-hosted (parallel port?) oscilloscopes for under $200.[http://www.electronickits.com/gold/gold.htm] | * under $200 : Carl's Electronics has some stand-alone and PC-hosted (parallel port?) oscilloscopes for under $200.[http://www.electronickits.com/gold/gold.htm] | ||
* $170 HobbyLab USB oscilloscope [http://hobbylab.us/USBOscilloscope/Home.htm] | * $170 HobbyLab USB oscilloscope [http://hobbylab.us/USBOscilloscope/Home.htm] | ||
* $500 DS1022C : 2 Channel, 25 MHz Rigol Technologies Inc.[http://rigolna.com/] | * $500 DS1022C : 2 Channel, 25 MHz Rigol Technologies Inc.[http://rigolna.com/] | ||
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* $999 CS320A Cleverscope [http://cleverscope.com/] (has a discussion forum[http://cleverscope.com/forum/]) | * $999 CS320A Cleverscope [http://cleverscope.com/] (has a discussion forum[http://cleverscope.com/forum/]) | ||
* $167 DrDAQ "data logger" (parallel port) from Pico Technology [http://www.drdaq.com/] | * $167 DrDAQ "data logger" (parallel port) from Pico Technology [http://www.drdaq.com/] | ||
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* $950 DSO-8502 USB Oscilloscope, 2 analog inputs (250MSa/s) + external trigger; 1 digital output (trigger out); buffer: 512K points/ch.[http://www.linkinstruments.com/oscilloscope85.htm] | * $950 DSO-8502 USB Oscilloscope, 2 analog inputs (250MSa/s) + external trigger; 1 digital output (trigger out); buffer: 512K points/ch.[http://www.linkinstruments.com/oscilloscope85.htm] | ||
* $799 DSO-8202 USB Oscilloscope, 2 analog inputs (200MSa/s) + external trigger; 1 digital output (trigger out); buffer: 128K points/ch.[http://www.linkinstruments.com/oscilloscope85.htm] | * $799 DSO-8202 USB Oscilloscope, 2 analog inputs (200MSa/s) + external trigger; 1 digital output (trigger out); buffer: 128K points/ch.[http://www.linkinstruments.com/oscilloscope85.htm] | ||
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''FIXME: [http://measurementcomputing.com/cbicatalog/directory.asp?dept_id=403 Measurement Computing] has some wireless and USB analog DAQ instruments -- add to the above list.'' | ''FIXME: [http://measurementcomputing.com/cbicatalog/directory.asp?dept_id=403 Measurement Computing] has some wireless and USB analog DAQ instruments -- add to the above list.'' | ||
''FIXME: [http://www.dataq.com/ DATAQ Instruments, Inc.] has some USB and Ethernet analog DAQ instruments -- add to the above list.'' | ''FIXME: [http://www.dataq.com/ DATAQ Instruments, Inc.] has some USB and Ethernet analog DAQ instruments -- add to the above list.'' | ||
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EasySync[http://easysync-ltd.com/] is a distributor of RockyLogic's ANT8/etc products. | EasySync[http://easysync-ltd.com/] is a distributor of RockyLogic's ANT8/etc products. | ||
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When you [http://search.ebay.com/search/search.dll?satitle=oscilloscope search eBay for oscilloscope], you might find some good deals. | When you [http://search.ebay.com/search/search.dll?satitle=oscilloscope search eBay for oscilloscope], you might find some good deals. | ||
− | = | + | == further reading == |
− | * other [[ | + | * other [[good equiptment to buy when getting started]] |
− | = | + | == external links == |
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* Keith has made a list of [http://www.techtravels.org/amiga/amigablog/?p=167 "PC USB logic analyzers that cost under $1000."][http://www.techtravels.org/tech/logicanalyzer.html], some of which can be used as an o'scope. ''Should I use the same $1000 price cut-off for the above list? Or perhaps double or halve it?'' | * Keith has made a list of [http://www.techtravels.org/amiga/amigablog/?p=167 "PC USB logic analyzers that cost under $1000."][http://www.techtravels.org/tech/logicanalyzer.html], some of which can be used as an o'scope. ''Should I use the same $1000 price cut-off for the above list? Or perhaps double or halve it?'' | ||
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* Brooke Clarke has posted a list of [http://prc68.com/I/PCO.html "PC based Oscilloscopes"] | * Brooke Clarke has posted a list of [http://prc68.com/I/PCO.html "PC based Oscilloscopes"] | ||
* [http://en.wikipedia.org/wiki/Oscilloscope Wikipedia: oscilloscope] | * [http://en.wikipedia.org/wiki/Oscilloscope Wikipedia: oscilloscope] | ||
* Other discussions of [http://forums.reprap.org/read.php?13,5086 "Cheap digital storage oscilloscope"] | * Other discussions of [http://forums.reprap.org/read.php?13,5086 "Cheap digital storage oscilloscope"] | ||
* [http://www.ganssle.com/microscopes.htm The Ganssle Group reviews Inexpensive USB Scopes and Logic Analyzers] | * [http://www.ganssle.com/microscopes.htm The Ganssle Group reviews Inexpensive USB Scopes and Logic Analyzers] | ||
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---- | ---- | ||
− | + | [[Category:Techniques]] | |
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− | [[Category:Techniques]] | ||
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